Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy.

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our Privacy Policy and User Agreement for details.

Successfully reported this slideshow.

Like this presentation? Why not share!

13,417 views

Published on

This Presentation has the details about the Avagardro's Law

No Downloads

Total views

13,417

On SlideShare

0

From Embeds

0

Number of Embeds

112

Shares

0

Downloads

810

Comments

8

Likes

13

No notes for slide

- 1. Avogadro’s law
- 2. Avogadro’s law <ul><li>Joseph Louis Gay-Lussac of France studied the volume relationship of reacting gases. </li></ul><ul><li>In 1809, he published his results. He summarized in a statement known as GAY-LUSSAC’S LAW OF COMBINING VOLUMES OF GASES: When measured at the same temperature and pressure, the ratios of the volumes of reacting gases are the small whole numbers. </li></ul>
- 3. Avogadro’s law <ul><li> </li></ul><ul><li>H 2 + Cl 2 2 HCl </li></ul><ul><li>1 volume 1 volume 2 volumes </li></ul><ul><li>1 molecule 1 molecule 2 molecules </li></ul><ul><li>1 mol 1 mol 2 mol </li></ul>
- 4. Avogadro’s law <ul><li>AVOGADRO’S LAW states that equal volumes of different gases at the same temperature and pressure contain the same number of molecules. </li></ul><ul><li>If the amount of gas in a container is increase d, the volume is increased . </li></ul><ul><li>If the amount of gas in a container is decreased , the volume is decreased . </li></ul>
- 5. Avogadro’s law <ul><li>As you increase the amount of gas (i.e. through inhalation) the volume of the balloon increases likewise. </li></ul>
- 6. Avogadro’s law <ul><li>This law was a real breakthrough in understanding the nature of gases. </li></ul><ul><li>1. It offered a rational explanation of Gay-Lussac’s law of combining volumes of gases and indicated the diatomic nature of elemental gases, such as hydrogen, chlorine and oxygen. </li></ul>
- 7. Avogadro’s law <ul><li>2. It provided a method for determining the molecular weights of gases of known molecular weight. </li></ul><ul><li>3. It afforded a firm foundation for the development of the kinetic molecular theory. </li></ul>
- 8. Avogadro’s law <ul><li>The mathematical form of Avogadro’s law is: </li></ul><ul><li>V ; V 1 = V 2 </li></ul><ul><li>n n 1 n 2 </li></ul><ul><li>Sample problem 1 </li></ul><ul><li>A sample of gas with a volume of 9.20 L is known to contain 1.225 mol. If the amount of gas is increased to 2.85 mol, what new volume will result if the pressure and temperature remain constant? </li></ul>
- 9. Avogadro’s law <ul><li>Solution </li></ul><ul><li>Given: V 1 = 9.20 L V 2 = ? </li></ul><ul><li>n 1 = 1.225 mol n 2 = 2.85 mol </li></ul><ul><li>Solution: </li></ul><ul><li>V 2 = n 2 V 1 = (2.85 mol) (9.20 L) = 21.4 L </li></ul><ul><li>n 1 (1.225 mol) </li></ul>
- 10. Avogadro’s law <ul><li>Sample exercises </li></ul><ul><li>1. If 0.25 mol of argon gas occupies a volume of 7.62 mL at a particular temperature and pressure, what volume would 0.43 mol of argon have under the same conditions? </li></ul>
- 11. Avogadro’s law <ul><li>Sample exercises </li></ul><ul><li>2. At a certain temperature and pressure, a balloon with 10.0 g of oxygen has a volume of 7.00 L. What is the volume after 5.00 g of oxygen is added to the balloon? </li></ul>
- 12. The End <ul><li>… .. Thank You ….. </li></ul>

No public clipboards found for this slide

Login to see the comments